I have been reading "Substance Abuse Counseling, Theory and Practice" by Stevens. I was just reading something about the topic tonight. The book says this about good qualities in substance abuse counselors:
"Effective group leaders tend to possess the following characteristics: presence in the 'here and now,' personal power, or self-efficacy, courage, willingness to engage in reflection, capacity for self-disclosure, authenticity, stable sense of identity, creativity, enthusiasm, and belief in group process."
These were in relation to group counseling I guess, not just overall counseling of addicts/alcoholics. There were other things listed too, but these were the ones I underlined in my book.